Odontocidium Tiger Crow underwatering?

[plantzzzzz]

Originally Posted by Ray

It's very difficult to tell from that photo – is the failing leaf part of the new growth, or from the older one to the forefront?

It could simply be normal leaf loss and nothing to be concerned about. These Oncidiinae hybrids start out with a tight cluster of leaves at the base, and gradually lose those lower leaves as pseudobulbs develop.

It's from the older one. I figure that the newest old pseudobulb will keep three leaves, one on top and two on the sides, so this falling off might be abnormal?